With the objective of evaluating sources and levels of organic matter on the production of snap-bean seeds, cv. Macarrão Trepador, there was set up an experiment in the Federal University of Paraíba, Brasil, from April to September/1998. The experimental design was of randomized blocks, in the factorial scheme 4 x 5, testing four sources of organic matter (cattle, goat and chicken manure and earthworm humus) in five levels (0, 10, 20, 30 and 40 t/ha of cattle and goat manure and 0, 5, 10, 15 and 20 t/ha of earthworm humus), in four replications. The maximum production of seeds was obtained with the levels of 27,66 t/ha of cattle manure (3,555.10 kg), 20.85 t/ha of goat manure (3,259.56 kg) and 9.87 t/ha of chicken manure (2,919.00 kg/ha) and earthworm compost (3,270 kg/ha). The most economic level of cattle manure was of 25.57 t/ha, with a revenue of 1,442.55 kg of seeds/ha (R$ 4,616.16), 19.11 t/ha of goat manure with a revenue of 1,164 kg of seeds/ha (R$ 3,724.80) and 5.17 t/ha of chicken manure with a revenue of 177.86 kg of seeds/ha (R$ 569.15). Under the point of view of seeds production, the application of earthworm compost propitiated productions above the national average, but its use in the production of snap-bean seeds is not economically viable. The economical analysis indicated the cattle manure as the most viable fertilization source to produce snap-bean seeds.